Which of the following statements about the eff0e.oyx6d9hf(drf7z9 7 qfd huect of surface area and volume on the cell’s processes is fal(d9do 7ffdze 0x6 h.7ruyfq9 hse?

  Which statement best describes stem z*j ea1 wxh-b2cells?

  Which is a correct de)di )m em)vxqz7 cg53mscription of the cell type adapted for gas exchange in the mzq7mcgm)5d) ix 3v )elungs?

  Which of the following explains the limitations on cecn 6d4bq8e3jbll size?

  What is this cell's most likely primcm5(vzm4a; pf l- ))bxyhyxa4 ary function, and where could it be located in a mamm4(y c4h5;x-lzm myb f va)p)xaal?

  Which of the following characteristics of type I pneumocytes contributql4cf hww4-*l e to increasing the rat4 l4-chqlw fw*e of gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marrow transplant from a 36 yea+qtxi mp0x 7j3r old. One of the functions of these cells is to produce red and white blood cellm 37txpj0iq x+s. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac musclsc*/s0n nec7*ck g/ol e cells and striated mugcl/* ko0se nc/cs *7nscle fibres?

Below is a diagram of a motor neuron. Neurons h6l8 ydsk8u byk7llc1 +g7h u9are the longest cells in the human bods 9 1dl6g l7 clu8yb+hh7kuk8yy.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respiratofgn 05(zx)zgiry distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alvezxfz5 gnig0) (oli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that emb *+x+brvd+c ja* ;svtyryonic stem cells are not used in the trea* *+cx bvj;t+y+vrdsatment of leukaemia?

  The table shows the diameters of red blood ,pq6y jq3n i*w(pqb:scells from different organisms. Which red blood cell will have the highest surface area tn,iyp3w6q(pb s:q j* qo volume ratio?

1.Explain how the shape of erytaoxj x (5(/glthrocytes and cells lining the proximal convoluted tubule make these cells more adapted to the functions they performax lg tx/(5(oj.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem cells and specialisekncq;5o peden 4-b.6bd cells is/are not true? bencop;n5bd4e kq- 6.

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of th1cb3 k6r.u.bx -vsdr:puhz8 h,v9g k se following is the correct order from smallest to largest?kbc,r6u 8 vg93: bssz phhr.d-.ukv1x

  Which row in the following table gives t hzjam o9(-qol8oro/- sv( 5pbhe correct disadvantages of the different stem cell o/zvoo-h bl 9(5qr (m8pj-aossources for therapeutic uses?

1.Describe how the use of stem cells may be/4j+3t1u nnk;nu cx , g0giask used to treat type I diabetes in the futur; ju1gtka3n /0,xcg4s+u nnkie.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialv z6m*96bpecl gp(0.avatk-e e4 0bqaised cells (not to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.